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White Widow is a balanced hybrid with 15 to 25% THC that flowers in 8 to 10 weeks indoors and yields 300 to 400 g/m². It crosses a Brazilian sativa with a South Indian indica, and it has stayed in the top tier of cannabis strains since the 1990s for one reason: it is resinous, forgiving to grow, and the high is bright and talkative rather than flattening. Here is the full profile, and what it takes to grow it in a Canadian season.
White Widow at a glance
| Strain | White Widow (feminized) |
| Genetics | Brazilian Sativa × South Indian Indica |
| Genetic balance | Balanced hybrid |
| THC | 15 to 25% |
| Indoor flowering time | 8 to 10 weeks |
| Outdoor harvest | Early to mid-October |
| Yield | 300 to 400 g/m² indoors, up to 500 g per plant outdoors |
| Taste and aroma | Earthy, herbal, skunk, spice |
| Effect | Uplifting, social, clear-headed; relaxing at higher doses |
| Difficulty | Beginner-friendly |
A note on the numbers in this article: harvest dates, flowering times and yields are ranges, not promises. They vary depending on growing conditions: the grower, the method and the season's weather. "Mold resistant" means mold tolerant: less prone to mold and slower to be affected. No strain is 100% mold resistant. How we set these numbers →
Published strain estimates; results vary by conditions.
White Widow Strain Review
White Widow is a balanced hybrid known for balanced, uplifting effects, a heavy coat of frosty white trichomes and an indoor flowering time of about 8 to 10 weeks. Published THC estimates run from roughly 15% to 25%, with very little CBD. It is one of the best-known cannabis strains in the world.
This review covers where White Widow comes from, its genetics, how it smells and tastes, what effects people report, and how it grows. Every grow figure below matches what we list on our White Widow feminized seeds page. All numbers are published strain estimates, and real results vary with genetics, environment and technique.
Origins and History of the White Widow Strain
White Widow was bred by Shantibaba (Scott Blakey) at Greenhouse Seed Company in the 1990s. It is widely reported to have won the Cannabis Cup in 1995, which helped make it one of the most recognized strains in the world. Many modern strains list it somewhere in their family tree.
Genetics and Lineage
White Widow is a cross of a Brazilian sativa and a South Indian indica. It is generally described as a balanced hybrid, although some sources call it sativa-dominant. The exact ratio depends on the breeder and the phenotype, so treat any single percentage with caution.
So is White Widow indica or sativa? Neither label tells you everything. The practical answer is that it is a hybrid that leans sativa, with effects that most growers and consumers describe as balanced.
Appearance and Characteristics
The name comes from the thick layer of white trichomes that covers the buds as they mature. Plants are generally described as vigorous and tolerant of different environments and growing styles, which is why White Widow is often recommended as a reliable choice for newer growers.
Aroma and Flavor Profile
White Widow is typically described as earthy, herbal, pungent, spicy and woody, with a skunky edge. The smell is strong, so plan for odour control if you grow indoors.
White Widow Cannabis Effects: What to Expect
People most often describe White Widow as well balanced: an energizing, clear-headed lift paired with a gentle, relaxing body feel. That balance is what many people like about it. Individual reactions vary with dose, tolerance and the specific plant, and THC at the higher end of the 15 to 25% range can feel strong to people with low tolerance.
Potential Side Effects and Precautions
As with other THC-rich cannabis, common side effects include dry mouth, dry eyes and dizziness. Higher doses can cause anxiety or a racing heart in some people. Start with a small amount, avoid driving or operating machinery, and speak with a doctor if you have a health condition or take medication. Cannabis is for adults only, where it is legal.
Growing White Widow: Cultivation Tips and Tricks
- Flowering time indoors: typically 8 to 10 weeks, depending on conditions.
- Outdoor harvest: early to mid-October, so start early and choose a sunny, sheltered spot.
- Yield: around 300 to 400 g/m² indoors on average, and up to about 500 g per plant outdoors in a sunny, well-kept spot.
- Humidity and airflow: good airflow matters. Dense, resinous buds are prone to mould and mildew, especially in humid weather or late in flower.
- Odour: the strong smell is hard to hide, so use carbon filtration indoors.
White Widow tolerates a wide range of conditions, which is why it suits beginners as well as experienced growers. It is still a living plant, so watch for pests and mould and adjust as you go.
Our feminized seeds come with a germination guarantee: if fewer than 80% of your seeds germinate, we send replacements.
White Widow in Popular Culture and Cannabis Community
White Widow has been a fixture of the cannabis scene for decades. Its Cannabis Cup win in 1995 and its use as a parent in other strains are a big part of why growers still look for it today.
Comparisons: White Widow vs. Other Classic Strains
Compared with Northern Lights, which is usually described as a relaxing, indica-leaning strain, White Widow is typically described as more energizing and clear-headed. Compared with Sour Diesel, a sativa-leaning strain often described as lively and pungent, White Widow is typically described as more balanced, with a gentler body feel. These comparisons reflect common descriptions, not lab measurements.
Frequently Asked Questions About White Widow
What is the THC content of White Widow?
Published estimates range from about 15% to 25% THC, with very little CBD. Actual levels depend on genetics, growing conditions and how the plant is dried and cured.
How long does it take for White Widow to flower?
Indoors, White Widow typically flowers in 8 to 10 weeks. Outdoors, harvest is usually in early to mid-October.
Is White Widow difficult to grow?
No. It tolerates a wide range of environments and growing styles, so it is often recommended for beginners. Keep airflow high to protect the dense buds from mould.
What are the primary effects of White Widow?
Most people describe a balanced effect: an energizing, clear-headed lift with a gently relaxing body feel.
What are the parents of White Widow?
A Brazilian sativa and a South Indian indica.
Are there any common side effects?
Dry mouth and dry eyes are the most common. Dizziness or anxiety can happen, especially at higher doses.
Final Verdict: Is White Widow the Right Strain for You?
If you want a proven, forgiving classic with balanced effects, a strong earthy and spicy character and a manageable 8 to 10 week flowering time, White Widow is a solid choice. Check the fine print on strength first: 15 to 25% THC is a wide range.
Ready to grow it? See our White Widow feminized seeds. Cannabis laws vary by jurisdiction, and it is your responsibility to know and follow the laws where you live.
Growing White Widow outdoors in Canada
White Widow finishes outdoors in early to mid-October, which makes it workable in southern Ontario, southern Quebec and coastal BC, and marginal further north. Three things decide it:
- Start indoors. Germinate inside and transplant after the last frost. The extra three or four weeks of veg is the difference between finishing and not.
- Watch October humidity more than October cold. White Widow is heavily resinous with dense flowers, and a wet autumn week is a bigger threat than a cool one. Keep airflow around the plant and harvest rather than gamble on another few days.
- Expect stretch. It has a strong sativa side, so it will roughly double in height after the flip. Plan the space before you flower it, not after.
Indoors it is one of the easier strains to learn on: sturdy, mould-resistant for its density, and tolerant of beginner mistakes with feeding. 8 to 10 weeks of flower and 300 to 400 g/m² is a realistic first-grow result.
Frequently asked questions
Is White Widow indica or sativa?
White Widow is a balanced hybrid with a strong sativa side. It crosses a Brazilian sativa with a South Indian indica, so it carries resin and structure from the indica side while the effect leans sativa: uplifting and clear-headed rather than sedating.
How much THC does White Widow have?
15 to 25% THC. That is a wide range because White Widow responds strongly to growing conditions; well-grown indoor flower sits at the top of it.
What does White Widow feel like?
A fast, bright onset: euphoric, talkative and creative, with a warm body relaxation underneath that grows at higher doses. It is a daytime and social strain rather than a before-bed one.
How long does White Widow take to flower?
8 to 10 weeks indoors. Outdoors it is ready early to mid-October.
How much does White Widow yield?
300 to 400 g/m² indoors, and up to 500 g per plant outdoors in good conditions.
Is White Widow good for beginners?
Yes. It is sturdy, forgiving of feeding mistakes, and resistant to mould for how dense it is. It is one of the strains we most often suggest for a first grow.
Why is it called White Widow?
The trichome coverage. Mature flowers are so heavily frosted that the buds look dusted white before they are even dry.
What are the side effects of White Widow?
Dry mouth and dry eyes are the common ones. At high doses the sativa side can tip into racing thoughts or anxiety for sensitive users, so start low.
Is there a CBD version of White Widow?
Yes. We carry CBD White Widow, which keeps the flavour profile with a much higher CBD to THC ratio.
Where to buy White Widow seeds
We ship White Widow feminized seeds from Quebec, usually the same day or within 24 hours of payment, Monday to Friday. Canada takes 3 to 7 days by standard post or 2 to 3 days by Express; the USA is 1 to 2 business days by Express. Free shipping on orders over $200.
Every pack carries our 80% germination guarantee and our delivery guarantee, and ships in plain unbranded packaging with no mention of the contents and no signature required.
General information, not medical or legal advice.
